Valve and guide bushing ejector



Jan. 26, 1937. J C V 2,069,133

l VALVE AND GUIDE BUSHING EJECTOR Filed March 51, 1936 Patented Jan. 26,1937 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates toimprovements in special tools with which towork upon internal combustion engines, and its principal object is asfollows.

To provide an ejector to lock the valve (intake or exhaust) of a FordV-8 motor in position so as to enable the removal of said valve and itsstem guide bushing from the cylinder block I without damage.

Other objects and advantages will appear in the following specification,reference being had to the accompanying drawing, in which:

Figure 1 is a combined sectional and elevation view showing the ejectorin assemblage with the valve and guide bushing which it is designed toremove.

Figure 2 is a similar view showing the valve and guide bushing almostremoved from the cylinder block.

Figure 3 is a detail sectional view illustrating the initial step ofcompressing the valve spring for the removal of the customary springretainer.

Figure 4 is a cross section taken on the line 4-4 of Fig. 1.

Figure 5 is a cross section taken on the line 5--5 of Fig. 1.

Figure 6 is a detail perspective view of the ejector shoe which isfitted on the valve stem in substitution for the original springretainer.

As previously indicated, the so called ejector comprises a special toolfor removing the valves and their guide bushings from the cylinder blockof the current Ford V-8 motor. As is known by those familiar with thistype of motor, the two sets of cylinders stand off at angles of 45 fromthe central vertical plane. The intake and exhaust valves are atslightly greater angles, and are located intermediately of the two setsof cylinders so as to reach the cam shaft which runs above the crankshaft. The stems of these valves slide in guides, as is customary, butthe valve guides of this particular motor are split, and are held byfriction in openings in the cylinder block. This means that the valveguide, referring to only one from now on, must be driven out when it isdesired to remove the valve and its spring preparatory to grinding orreplacement.

In order to amplify the above statements, reference is made to thedrawing. I designates the top surface of the cylinder block on theexhaust side of the motor. All that will be stated in connection withthe invention will relate as well to the intake side of the motor. Thepart I is exposed to view when the cylinder head (not shown) is removed,and rather than appearing upright as in the drawing, the part I actuallystands at an angle of 45, sloping upwardly toward the right and towardthe foregoing central plane of the motor.

The valve seat 2 is formed in the cylinder block I, this seat merginginto a tapering passageway 3 which terminates in a cylindrical end 4,the passageway and cylindrical end occurring in a portion 5 which isintegral with the cylinder block, dividing off the external water jacket6 from the internal exhaust opening (not shown). The portion 5 connectswith a wall 1. The cylindrical end 4 has a counterbore 8 in this wall.The latter continues at 9 and ends in a bearing ID in which a tappet His slidable.

A valve I2 is adapted to coact with the seat 2. The stem |3 of thisvalve is slidably carried by the split bushing 4- which provides theguide. This bushing includes a large part l5 which is tightly andfrictionally held in the cylindrical end 4. Said part has a groove l6which contains a forked member ll, known as a thrust ring. This socalled ring is adapted to seat in the counterbore 8 (Fig. 3) and it hasa fingerpiece l8 standing off at an angle which enables its removal whenthe bushing I4 is displaced inwardly (Fig. 1).

The foregoing valve stem l3 terminates in an enlarged flared extremityl9 which is adapted to be engaged with the tappet I by the spring 20 andwhich also provides the anchorage for the customary valve springretainer 2| (Fig. 3). The latter is of a horseshoe shape and it must beremoved as one of the first acts of removing the valve and its guidebushing.

Thus far the description relates to structure that is common to theforegoing type of motor. The first step preparatory to the use of theinvention consists of using a spring compressor 22 (Fig. 3) to compressthe spring 20, so as to release the spring retainer 2|. This retainer isremoved, and presently the spring 20 is allowed to expand into contactwith the bearing Ill which it will do when the compressor 22 is takenaway.

The following description relates to the structure that comprises theinvention. Before taking the spring compressor 22 away, an ejector shoe23 is substituted for the retainer 2|. This shoe is shown in detail inFig. 6. It is of the same general horseshoe shape as the retainer 2|,but it does not have the flange of the latter, and consequently can moveinside of the convolutions of the spring 20. In other words, this shoeis of a substantially ring form but it is slotted at 24, giving it ahorseshoe shape, and it is tapered at The latter, because of its flaredform, tends to hold the shoe 23 securely so that it will not readilyslip ofi.

A split bearing sleeve 26 is assembled around the valve stem l3 which ispulled up sufiiciently far out of the cylinder block I to make itaccessible (Fig. 1). This is possible because the spring 20 isdisengaged. The sleeve 26 includes a cup 21 to contain the valve l2. Thecup is provided with a seat 28 for the bevel of the valve to rest uponwithout injury. Said seat eventually communicates with a counterbore 29which is provided to accommodate a circular flange 30 on the valve stem.

External threads 3| on the cup 21 provide for screwing on the cap 32 ofwhat is now collectively known as the ejector head, said head consistingof the parts 26, 21, 32. The latter has a bushing 33 with a knurledprominence 34, the latter providing an anvil.

Preparatory to screwing the ejector head together the head 35 of aplunger rod 36 is put in place. This plunger rod head fills practicallyall of the internal space in the parts 21, 32 and when these are screwedtogether the head 35 is jammed tightly between the valve l2 and theopposite wall 31 of the cap 32. This locks the valve in tight engagementwith the ejector.

A plunger 38 is slidable on the rod 36 which thus acts as a guide. Thisserves as a hammer and it is adapted to strike blows either against theanvil 34 or against a shoulder 39 on the free extremity of the plungerrod. This shoulder is shown in the form of a nut.

The operation is readily understood. The first act is to use the springcompressor 22 (Fig. 3) for the compression of the spring 20 to enablethe removal of the valve spring retainer 2 l The ejector shoe 23 isslipped on to the valve stem in its place while the spring is still heldcompressed. Thereafter the compressor 22 is taken away letting thespring 20 dropto the bearing I0.

The valve stem I3 is pulled up (Fig. 1) and the two halves of the sleeve26 are assembled around the valve, asshown. The plunger head 35 isinserted in the cup 21 whereupon the cap"32 is screwed home, looking thevalve and tool together as already brought out.

At first the plunger 38 is used to strike a number of blows inthedirection of arrow a (Fig. 1) These bolts are transferred to thebushing: l4 through the split bearing sleeve 26, which then contacts thelarge part of the bushing. The

bushing is displaced sufiiciently in the inward dia reverse order inreplacing the valve and itsuide bushing. The bushing is first driven be-2,069,133 25 to enable its resting upon the extremity l9.

yond its normal position (Fig. 3) to the position in Fig. 1 so that thethrust ring H can be replaced. The ejector shoe 23 is used in drivingthe bushing home. The spring 20 is finally compressed for the removal ofthe shoe 23 and the replacement of the spring retainer 2|.

I claim:

1. Means to tightly lock a valve and a portion of its stem in anenclosing position, said stem being adapted to be carried by a. bushingin the cylinder block of an internal combustion engine, a guide rigidlyextending from said means, hammering means carried by the guide by whichto impart hammer blows on the enclosing means for moving the bushing inone direction in the cylinder block, said guide having a shoulderagainst which hammer blows are imparted by said hammering means formoving the guide and enclosing means in the opposite direction, andmeans attached to the valve stem for imparting said blows to the bushingand moving it in said opposite direction.

2. A tool which includes a member to enclose a valve and a portion ofits stem, said part'engaging one end of the stem bushing tightly andfrictionally seated in the cylinder block of an internal combustionengine, means embodied in the tool for delivering blows in one directionthrough said enclosing member to the bushing to drive the bushing insaid direction out of l the cylinder block, and further means includedin the tool for delivering blows in the opposite direction to thebushing and driving said bushing in said direction from the cylinderblock.

3. A tool comprising a plunger rod forming a guide, said plunger rodhaving a head on one end and'a shoulder on the other, an ejector headincluding means to tightly clamp the plunger rod head onto a valve, saidvalve having a stem working in a guide bushing which is frictionallyheld in the cylindrical end of a passageway in an engine cylinder block,said end having a counterbore to contain a thrust ring on the bushing, aplunger movable on the rod to deliver hammer blows to the ejector headin one direction, said ejector head having a portion then engaging oneend of the bushing to drive the bushing in said direction for thedisplacement of the thrust ring from its counterbore so that it can beremoved,

andmeans temporarily fitted on the valve stem 1 to engage the other endof the bushing when moving the plunger to deliver hammer blows to theshoulder for driving the bushing in the opposite direction.

4. An ejector tool comprising a split bearing sleeve including a cup, aplunger rod having a head to be fitted in the cup, 2. bushing on theplunger rod having a cap, there being means to secure the cap and cuptogether to rigidly hold the head, said bushing having an anvil and saidguide rod having a shoulder, a plunger slidable on the rod fordelivering hammer blows to the anvil and shoulder, and an ejector shoeto coact with said ejector when the hammer blows are delivered in onedirection.

LEONARD J. CLOSSEY.

